Does old have a short vowel sound?

No, "old" does not have a short vowel sound. It has a long o sound, similar to the "o" in "go" or "toe."

Here's how to think about it:

* Short vowels are typically found in words like "cat," "bed," and "dog," where the vowel sound is quick and short.

* Long vowels often have a sound similar to the letter's name, like "o" in "old."

Therefore, "old" has a long vowel sound.